Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Category
Metamorphic Rock (Composed Of Multiple Minerals)
Browse metamorphic rock (composed of multiple minerals) specimens identified by the Rock Identifier community.
Petrified Wood
Silicified wood, primarily composed of Quartz (SiO2)
Mineral, often found in sedimentary deposits
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite
sedimentary
Banded Sandstone
Arenite (with iron oxide banding)
sedimentary
Sandstone (Ferruginous)
Arenite (Siliclastic Sedimentary Rock)
sedimentary
Greenschist
Greenschist (comprising Actinolite, Chlorite, and Epidote)
metamorphic
Yellow Quartzite (River Pebble)
Quartzite (primarily Silicon Dioxide, SiO2)
metamorphic
Azurite and Malachite on Matrix
Azurite: Cu3(CO3)2(OH)2; Malachite: Cu2CO3(OH)2
mineral
Quartz
Quartz (Silicon Dioxide - SiO2)
Mineral
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
mineral
Granite (including Pegmatite variants)
Phaneritic Plutonic Rock (composed primarily of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Muscovite mica)
Igneous
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Lapis Lazuli
Complex metamorphic rock primarily composed of Lazurite ((Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2), Calcite, and Pyrite
metamorphic
Nuummite
Nuummite (Orthorhombic amphiboles: Anthophyllite and Gedrite)
metamorphic
Sandstone (Micaceous Sandstone)
Arenite (SiO2 with KAl2(AlSi3O10)(OH)2 inclusions)
sedimentary
Metaconglomerate
Metaconglomerate (Quartzite conglomerate)
metamorphic
Orthoclase Feldspar with Quartz
Orthoclase (KAlSi3O8)
mineral
Unidentifiable Specimen
Undetermined
Unknown
Garnet (likely Pyrope or Almandine)
Garnet Group (complex nesosilicate minerals, e.g., Pyrope Mg3Al2(SiO4)3, Almandine Fe3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3, Grossular Ca3Al2(SiO4)3, Andradite Ca3Fe2(SiO4)3, Uvarovite Ca3Cr2(SiO4)3). The vivid red color in the image strongly suggests Pyrope or Almandine.
Mineral
Granite
Phaneritic Igneous Rock (composed mostly of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Magnetite (Lodestone variety)
Magnetite (Fe3O4)
mineral
Lapis Lazuli
Lapis lazuli (a rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Pegmatite (likely Granitic Pegmatite)
Pegmatite (a coarse-grained igneous rock, often with granitic composition)
igneous
Quartz
Silicon dioxide (SiO2)
Mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Milky Quartz Vein with Iron Staining
Silicon Dioxide (SiO2)
mineral
Magnetite Orthorthotropic Rock
Magnetite (Fe3O4)
mineral
Red Garnet
Pyrope or Almandine (Silicate group, X3Y2(SiO4)3)
Mineral
Garnet Schist
Garnetiferous Micaceous Schist
metamorphic
Quartz
Quartz (Silicon Dioxide, SiO2)
Mineral
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Blue Apatite
Fluoroapatite (Ca5(PO4)3F)
mineral
Gneiss
Gneiss
metamorphic
Magnetite
Magnetite (Fe3O4)
mineral
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Blue Lace Agate
Chalcedony (a form of Quartz) - SiO2
Mineral
Pink Rhodonite
Manganese Silicate (MnSiO3)
mineral
Tiger's Eye (Mineral Collection)
Tiger's Eye (SiO2 with crocidolite inclusions)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral